Oil burner



July 17, 1923. 1,461,908

1 H.` IZARD OIL BURNER Filed March 8,' 1921 2 Sheets-Sheet 1 ITU/P/VE YJuly 17, 1923.- 1,461,908

H. IZARD OIL BURNER Filed March e, 1921 zsheets-sheet 2 atented July 17,1923.

`HENRY IZARD,'OF PORTLAND, OREGON.

OIL BURNER. f

Application led March 8, 1921. Serial No. 450,562.

To all whom t may concern.'

Be it known that I, HENRY IZARD, a citi zen of the United States, andresident of Portland, in the county of Multnomah and State of Oregon,have invented a new and useful Uil Burner, of which the following is aspecification.

This invention relates more partlcularly to devices for burning oils infurnaces.

The objects of my invention are to provide an automatic control forheat, and to produce this heat in the most economical manner with aminimum amount of labor or danger.

I attain these results in the manner set forth in the followingspecifica-tion and illustrated in the accompanying .drawings in which:

Figure 1 is a side elevation of the device with portions cut away.Figure 2 is a plan of the combustion box with the air discharge piperemoved. Figure 3 is a front eleva tion of the device showing the meansfor varying the speed of the fan. Figure 4 is a vertical section alongthe line 4 4 in Fig. 1. A Y

Similar numbers of reference refer to the same'or similar partsthroughout the several views.

Referringin detail to. the drawings I have constructed my device asfollows: The circular box within which the combustion takes place isprovided at each side with a lug 11 through which pass the verticalstandards 12 which are secured by means of the set screws 13 when thebox is at the desired height. A

Around the ,upper edge of the box 10 I have provided a bevelled ring 14which is easily removable and whose function it is to turn the flameback to the center of the box thereby assistingin securing completecombustion of the fuel. A baie plate 15 is mounted on a nipple 16 whichthreads into the bottom of the combustion box. A pilot light jet 17consisting of a perforated pipe plug `underneath the -baiiie plate v151s adapted to partly close the openingof the gas pipe 18. A drain pipe19 leads from the bottom of the box 10 to a horizontal pipe 20containing a trap 21 having" an outlet 22 at approximately the sameheight as the pipe 20. y It will be understood that the combustion boxl() and its attachedprts are within the furnace and that the trap 21 ison the outside of the furnace. .l

` At some distance in front of the furnace on the pedestal 23 is mounteda base plate 24 upon which is secured a box-like frame 25 having a halfpartition 26 near its center and a cover 27 on the furnace end and asecond cover 28 on the opposite end. Behind the cover 28 and attachedtothe partition 26 is a rheostat 29 joined by means of the wires 30 tothe motor 31 which drives a fan within the casing 32.

. Behind the cover 27 is mounted a mechanism 32A such as are commonlyfound in the market today and are known as reversible motors which areWired in a three 'Way circuit containing a thermostat 33 whose maximumtemperature Will close the circuit of the motor in the mechanism 32A andcause the crank 34 to make a complete revolution in lone direction. andthe mini- -mum temperature on the thermostat closing the other side ofthe circuit which causes the crank 34 to make a complete revolution inthe opposite direction.

The fuel consumed by this device passes through the pipe 35 containingthe valve 36 which is operated by the slotted lever 37 whose one side 38is considerably longer than the side 39. A pin on the crank 34 Aisadapted to engage the slot between the members 38 and 39. A clock-wisemovement of the crank 34 Will move the lever 37 to the right and acounter-clockwise movement will move same to the left, thereby openingor closing the valve 36 as the case may be.

Mounted Within the case 25 is a knife switch 41 whose handle 42 isjoined by means of a connecting rod 43 to the lever 37. A spring` 44 onthe end of the rod 43 insures a rapid breaking of the circuit and thecollar 45 on the rod 43 insures a positive return of the knife plate inthe op posite direction.

The pipe 35 also contains a manually controlled valve 46 by means ofwhich the flow of oil to the burner is regulated in proportion to thespeed of the fan. A third valve 47 in the pipe 35 is supplied with anoperating lever 48 from the raised end of which is suspended a cup 49which is underneath the outlet 22 of the pipe 20. If desired a weightmay be attached to the end 50 of the lever 48 to over-balance the cup49.

An air pipe 51 conveys the air from the fan to an elbow 52 which isjoined by a dove tail 53A to the combustion box 10.

Ithe crankI 34 will open the valve 36 and..

close the switch 41 which starts the airl fan; The Hame from the pilotlight 17 ignites the atomized fuel now projected against the baiie plate15, and when the temperature at the thermostat reaches its other limitthe crank 34 is operated one revolution in theopposite direction,thereby stopping the fan and cutting o the How of oil.

The pilot lamp, of course, may be fed by gas 0r kerosenewithoutdeparting from the spirit of my invention. If for -any reasonthis flame should become extinguished and oil accumulate in the box 10it would run out through the trap 21 into the cup 49 and automaticallycut off further ow of oil. The trap 21 prevents the escape of gas orflame from the outlet 22 ofthe waste pipe 20 during ordinary operations.

It will be understood that whenA this device is used in greenhouses andunder small boilers where there is no danger of developing too much heatthat the automatic re l ulation may be dispensed with, but it 1s alwaysdesirable to be able to control the relation between the fuel and airconsumption.

l have constructed the members 10, 14, 52 and 53 of aluminum bronzecomposed of approximately ten per cent of aluminum and ninety per centof copper, as experience has indicated that this is the onl metal whichwill withstand the action of t e flame thus produced, and l regard'it asan essential to the success of my invention.

While l have thus illustrated and described my invention it is not mydesire to limit myself to this precise form or method of application,but intend that it shall cover all forms and modifications that fallfairly within the appended claims.

What I claim is.:

1. In an oil burner, the combination of an'open to combustion box havinga baille plate in t e center of its bottom, an inverted air suppl ingelbow suspended over the side of said liox and discharging downl wardlyupon said baille, an oil feed pipe Within said air pipe and a gas pilotlamp within said combustion box.

2. In an oil burner, the combination of an open top combustion boxhaving a baille plate in the center ofits bottom with an inverted airsupplying elbow suspended over the side of said box and having itsoutlet over said baille plate, means for forcing air through said elbowagainst said baille and an oil supply pipe within said elbow and havingits discharge over said bale.

3. In an oil burner, the combination of an open top firebox having abaille plate in the center of its bottom with an air Supplying pipeadapted to discharge air downwardly against said baille, an oil supplypipe Within said air pipe whose outlet is alsoover said baille a cutoffvalve in said oil pipe, a `lever for operating saidvalve, a containerfor liquids attached to said lever and adapted to close said valve whenliquid is placed in the container and a trapped drain pipe leading fromthe bottom of said combustion box and discharging into said container.

.4. In an oil burner, the combination of an aluminum bronze combustionbox having an open top, a bailieplate of the same metal mounted in thecenter of the box, a

.pilot lamp under said baille plate, a drain pipe in the bottom of saidbox, adjustable standards secured to the sides of said box, an air pipejoined to the side of said box by means of a dove-tailed elbow, adischarge ti for said air pipe.` consisting of a return liend ofaluminum bronze mounted on said elbow and terminating above said bailleplate, and a fuel ipe passing vertically into said elbow andpterminating .above the open end of said return bend. v HENRY IZARD.

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